Github user Leemoonsoo commented on the issue:
https://github.com/apache/zeppelin/pull/2679
Thanks @mephi42 for the improvement.
Here's message from CI
```
Looks like travis-ci is not configured for your fork.
Please setup by swich on 'zeppelin' repository at
https://travis-ci.org/profile and travis-ci.
And then make sure 'Build branch updates' option is enabled in the settings
https://travis-ci.org/mephi42/zeppelin/settings.
To trigger CI after setup, you will need ammend your last commit with
git commit --amend
git push your-remote HEAD --force
See
http://zeppelin.apache.org/contribution/contributions.html#continuous-integration.
```
Could you try setup CI and see if everything goes green?
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